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Unformatted text preview: is I have a large nucleus ( germinal vesicle).
Many oocytes contain localized determinants, typically
mRNAs. For historical reasons, the less yolky end of the oocyte is
called the animal pole; the opposite is the vegetal pole. The Ovary
One follicle per
by the follicle
Campbell et al, 5e, Fig. 46.13 Oogenesis in Mammals Gilbert, 9e,
Fig. 16.31 Oogenesis in
The mature follicle
must rupture to
release the oocyte,
which normally is
swept into the
Fallopian tube Gilbert, 9e,
Fig. 16.31 Female Reproductive Structure
ﬁmbriae Fallopian Tube Fimbriae sweep the oocyte/cumulus complex
into the open end of the Fallopian tube
Adapted from Campbell et al, 5e, Fig. 46.9 Fallopian Tube: Hamster
Opening of fallopian tube Stained hamster oocyte/cumulus complex Ovulation: Hormonal
stimulates the anterior
pituitary via the release of
hormones (GnRHs) speciﬁc
luteinizing hormone (LH)
or follicle stimulating
hormone (FSH) Purves et al, 6e, Fig. 42.14 Ovulation: Hormonal
regulate cells in the ovary.
Estrogen is made by
connective tissue cells in the
ovary. Progesterone is made
by the follicle, but especially by
the remnant of the follicle
(corpus luteum). Estrogen
and progesterone inhibit
hormone production by the
hypothalamus and pituitary.
thickening of the uterine lining.
Purves et al, 6e, Fig. 42.14 Control of Ovulation: Hormonal
Regulation Gilbert, 7e, Fig. 19.30 Control of Ovulation: Hormonal
Regulation Gilbert, 7e, Fig. 19.30 Human Chorionic Gonadotropin & Progesterone hCG
endometrium hCG is made by the
embryo and stimulates
the corpus luteum to
inhibits contraction maintain progesterone
production. ﬁrms cervix Ulmann et al...
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This note was uploaded on 11/08/2013 for the course ZOOLOGY 470 taught by Professor Hardin during the Fall '12 term at University of Wisconsin Colleges Online.
- Fall '12